/* ============================================== */
/* COURSES MODULE — courses.css (Premium Light)  */
/* ============================================== */

/* Main Header/Hero */
.courses-header {
    min-height: 50vh;
    padding: 10rem 2rem 4rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: radial-gradient(circle at 50% 0%, rgba(88, 80, 236, 0.05), transparent 50%);
}

.courses-title-gradient {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1.05;
    background: linear-gradient(135deg, var(--text-main), var(--primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}

.courses-subtitle {
    max-width: 800px;
    margin: 0.5rem auto 2.5rem;
    font-size: 1.25rem;
    color: var(--text-dim);
    line-height: 1.7;
}

/* Controls & Filter Groups */
.courses-controls-section {
    max-width: 1200px;
    margin: 0 auto 3rem;
    padding: 0 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}

.courses-search-container {
    width: 100%;
    max-width: 600px;
    position: relative;
}

.courses-search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    pointer-events: none;
}

#courseSearch {
    width: 100%;
    padding: 1.1rem 1.5rem 1.1rem 3.5rem;
    background: white;
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    font-size: 1.05rem;
    color: var(--text-main);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

#courseSearch:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 10px 30px rgba(88, 80, 236, 0.08);
}

.filter-group-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    align-items: center;
}

.filter-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-label {
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    margin-right: 0.5rem;
}

.filter-chip {
    padding: 0.5rem 1.25rem;
    background: white;
    border: 1px solid var(--glass-border);
    color: var(--text-dim);
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-chip:hover {
    background: var(--bg-alt);
    border-color: var(--primary-light);
}

.filter-chip.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 6px 15px rgba(88, 80, 236, 0.15);
}

/* Course Grid */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem 6rem;
}

/* Course Card Design */
.course-card {
    background: white;
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-md);
    position: relative;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.course-thumbnail-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background: #f1f5f9;
    overflow: hidden;
}

.course-thumbnail {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.course-card:hover .course-thumbnail {
    transform: scale(1.05);
}

.course-badge-free {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: linear-gradient(135deg, var(--success), #34d399);
    color: white;
    padding: 0.35rem 0.85rem;
    border-radius: 30px;
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.2);
}

.course-card-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.course-card-category {
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--primary);
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.course-card-title {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.4;
    margin-bottom: 0.75rem;
}

.course-card-description {
    font-size: 0.95rem;
    color: var(--text-dim);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.course-card-instructor {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.course-card-meta {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    padding: 1rem 0;
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 1.5rem;
}

.meta-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.meta-val {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-main);
}

.meta-lbl {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    margin-top: 0.15rem;
}

.course-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.course-price-label {
    font-size: 1.15rem;
    font-weight: 900;
    color: var(--success);
}

.course-start-btn {
    padding: 0.65rem 1.25rem;
    background: var(--primary);
    color: white !important;
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.88rem;
    transition: all 0.2s ease;
    box-shadow: 0 4px 10px rgba(88, 80, 236, 0.15);
}

.course-start-btn:hover {
    background: var(--primary-hover);
    box-shadow: 0 6px 15px rgba(88, 80, 236, 0.25);
    transform: translateY(-1px);
}

/* Course Details Page Specific Styles */
.course-detail-header {
    background: linear-gradient(135deg, rgba(88, 80, 236, 0.03), rgba(236, 72, 153, 0.02));
    padding: 11rem 2rem 5rem;
    border-bottom: 1px solid var(--glass-border);
}

.course-detail-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.4fr 0.8fr;
    gap: 4rem;
}

.course-detail-info {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.course-detail-badge {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 0.4rem 1.15rem;
    border-radius: 30px;
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    align-self: flex-start;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 12px rgba(88, 80, 236, 0.2);
}

.course-detail-title {
    font-size: clamp(2.25rem, 5vw, 3.25rem);
    font-weight: 900;
    color: var(--text-main);
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.course-detail-instructor-bar {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-weight: 600;
    color: var(--text-dim);
    font-size: 0.95rem;
    flex-wrap: wrap;
}

.course-detail-media-card {
    background: white;
    border: 1px solid var(--glass-border);
    border-radius: 28px;
    padding: 1.5rem;
    box-shadow: var(--shadow-xl);
    position: sticky;
    top: 100px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.detail-media-preview {
    width: 100%;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    aspect-ratio: 16/9;
}

.detail-media-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.detail-enroll-price-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 0.5rem;
}

.detail-price-text {
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--text-main);
}

.detail-free-pill {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    font-weight: 800;
    font-size: 0.85rem;
    padding: 0.35rem 0.85rem;
    border-radius: 50px;
    text-transform: uppercase;
}

.enroll-btn {
    width: 100%;
    padding: 1.1rem;
    background: var(--primary);
    color: white !important;
    border: none;
    border-radius: 16px;
    font-weight: 800;
    font-size: 1.05rem;
    cursor: pointer;
    box-shadow: 0 10px 25px rgba(88, 80, 236, 0.25);
    transition: all 0.3s;
    text-align: center;
}

.enroll-btn:hover {
    background: var(--primary-hover);
    box-shadow: 0 15px 30px rgba(88, 80, 236, 0.35);
    transform: translateY(-2px);
}

.detail-stats-list {
    display: flex;
    flex-direction: column;
    gap: 0.88rem;
    border-top: 1px solid var(--glass-border);
    padding-top: 1.25rem;
}

.detail-stat-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-dim);
}

.detail-stat-row span:last-child {
    color: var(--text-main);
    font-weight: 700;
}

/* About Course Content Area */
.course-body-section {
    padding: 4rem 2rem 6rem;
    max-width: 1200px;
    margin: 0 auto;
}

.course-body-grid {
    display: grid;
    grid-template-columns: 1.45fr 0.75fr;
    gap: 4rem;
}

.course-body-left {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    text-align: left;
}

.about-card {
    background: white;
    border: 1px solid var(--glass-border);
    border-radius: 28px;
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
}

.about-card h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

.learn-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    list-style: none;
    padding: 0;
    margin-bottom: 2rem;
}

.learn-grid li {
    font-size: 0.95rem;
    color: var(--text-dim);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    line-height: 1.5;
}

.learn-grid li::before {
    content: "✓";
    color: var(--success);
    font-weight: 900;
    font-size: 1.1rem;
    line-height: 1;
}

.audience-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.audience-list li {
    font-size: 0.95rem;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.audience-list li::before {
    content: "•";
    color: var(--primary);
    font-weight: 900;
    font-size: 1.5rem;
    line-height: 1;
}

/* Syllabus Section */
.syllabus-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.syllabus-module {
    background: #ffffff;
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.25s ease;
}

.syllabus-module:hover {
    border-color: var(--primary-light);
}

.syllabus-module-header {
    width: 100%;
    padding: 1.25rem 1.5rem;
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
    cursor: pointer;
    outline: none;
}

.syllabus-module-header::after {
    content: "+";
    font-size: 1.5rem;
    color: var(--primary);
    transition: transform 0.25s ease;
    font-weight: 400;
}

.syllabus-module.active .syllabus-module-header::after {
    content: "-";
    transform: rotate(180deg);
}

.syllabus-module-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
    background: #fafbfd;
}

.syllabus-module.active .syllabus-module-body {
    max-height: 1000px;
    transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--glass-border);
}

.syllabus-module-body p {
    font-size: 0.95rem;
    color: var(--text-dim);
    line-height: 1.6;
}

/* More Courses Section */
.more-courses-section {
    padding: 5rem 2rem 6rem;
    background: var(--bg-alt);
    border-top: 1px solid var(--glass-border);
}

.more-courses-header {
    max-width: 1200px;
    margin: 0 auto 3rem;
    text-align: left;
    padding: 0 2rem;
}

.more-courses-header h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

/* Empty search state */
.courses-empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    background: white;
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--shadow-sm);
}

.courses-empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.courses-empty-state h3 {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.courses-empty-state p {
    color: var(--text-muted);
}

/* Responsiveness overrides */
@media (max-width: 1024px) {
    .course-detail-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .course-body-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .course-detail-media-card {
        position: static;
        width: 100%;
    }
}

@media (max-width: 768px) {
    .courses-header {
        padding-top: 8rem;
    }
    .course-detail-header {
        padding-top: 9rem;
    }
    .learn-grid {
        grid-template-columns: 1fr;
    }
    .about-card {
        padding: 1.75rem;
    }
    .courses-grid {
        padding: 0 1rem 4rem;
        gap: 1.5rem;
    }
}

/* Dynamic Syllabus Detailed Lesson Listing Styles */
.module-header-left {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-right: 1.5rem;
}

.module-meta-info {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg-alt);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
}

.details-lesson-list {
    list-style: none;
    padding: 0.5rem 0 0 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.details-lesson-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: white;
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.01);
}

.details-lesson-item:hover {
    border-color: var(--primary-light);
    background: rgba(88, 80, 236, 0.02);
    transform: translateX(6px);
    box-shadow: var(--shadow-sm);
}

.details-lesson-left {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-grow: 1;
    text-align: left;
}

.details-lesson-play-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(88, 80, 236, 0.08);
    color: var(--primary);
    border-radius: 50%;
    font-size: 0.8rem;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.details-lesson-item:hover .details-lesson-play-icon {
    background: var(--primary);
    color: white;
    transform: scale(1.1);
}

.details-lesson-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.details-lesson-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-main);
    transition: color 0.2s ease;
}

.details-lesson-item:hover .details-lesson-title {
    color: var(--primary);
}

.details-lesson-description {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.45;
    max-width: 600px;
}

.details-lesson-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.details-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.85rem;
    border-radius: 30px;
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.details-badge-video {
    background: rgba(88, 80, 236, 0.06);
    color: var(--primary);
    border: 1px solid rgba(88, 80, 236, 0.1);
}

.details-badge-notes {
    background: rgba(16, 185, 129, 0.06);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.1);
}

@media (max-width: 600px) {
    .module-header-left {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.35rem;
    }
    
    .details-lesson-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        padding: 1.25rem;
    }
    
    .details-lesson-right {
        align-self: flex-start;
        width: 100%;
        border-top: 1px solid var(--glass-border);
        padding-top: 0.75rem;
    }
}